Формы создания/редактирования зон, устройств и правил автоматизации

ZoneFormScreen/DeviceFormScreen/AutomationRuleFormScreen — одна форма
на создание и редактирование, показ ошибок валидации Laravel (422)
по полям. Списки зон/устройств/правил дополнены FAB "добавить",
свайпом/меню удаления и переходом в форму по тапу — всё только для
owner (RBAC), viewer видит те же списки в режиме только чтения.
Опции дропдаунов (типы устройств, датчики/актуаторы, capabilities)
берутся из данных бэкенда, не хардкодятся.

lib/screens/zones_tab.dart

@@ -2,7 +2,9 @@ import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
 
 import '../core/api_service.dart';
+import '../core/auth_service.dart';
 import '../models/zone.dart';
+import 'zone_form_screen.dart';
 
 class ZonesTab extends StatefulWidget {
   const ZonesTab({super.key});
@@ -28,44 +30,97 @@ class _ZonesTabState extends State<ZonesTab> {
     await future;
   }
 
+  Future<void> _openForm({Zone? zone}) async {
+    final saved = await Navigator.of(context).push<bool>(
+      MaterialPageRoute(builder: (_) => ZoneFormScreen(zone: zone)),
+    );
+    if (saved == true) _refresh();
+  }
+
+  Future<bool> _confirmDelete(Zone zone) async {
+    final confirmed = await showDialog<bool>(
+      context: context,
+      builder: (context) => AlertDialog(
+        title: const Text('Удалить зону?'),
+        content: Text('«${zone.name}» будет удалена без возможности восстановления.'),
+        actions: [
+          TextButton(onPressed: () => Navigator.pop(context, false), child: const Text('Отмена')),
+          TextButton(onPressed: () => Navigator.pop(context, true), child: const Text('Удалить')),
+        ],
+      ),
+    );
+    if (confirmed != true || !mounted) return false;
+
+    try {
+      await context.read<ApiService>().deleteZone(zone.id);
+      return true;
+    } catch (e) {
+      if (mounted) ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text('$e')));
+      return false;
+    }
+  }
+
   @override
   Widget build(BuildContext context) {
-    return RefreshIndicator(
-      onRefresh: _refresh,
-      child: FutureBuilder<List<Zone>>(
-        future: _future,
-        builder: (context, snapshot) {
-          if (snapshot.connectionState != ConnectionState.done) {
-            return const Center(child: CircularProgressIndicator());
-          }
-          if (snapshot.hasError) {
-            return ListView(
-              physics: const AlwaysScrollableScrollPhysics(),
-              children: [
-                Padding(
-                  padding: const EdgeInsets.all(24),
-                  child: Text('${snapshot.error}', textAlign: TextAlign.center),
-                ),
-              ],
-            );
-          }
+    final isOwner = context.watch<AuthService>().user?.isOwner ?? false;
 
-          final zones = snapshot.data!;
-          return ListView.separated(
-            physics: const AlwaysScrollableScrollPhysics(),
-            itemCount: zones.length,
-            separatorBuilder: (context, index) => const Divider(height: 1),
-            itemBuilder: (context, index) {
-              final zone = zones[index];
-              return ListTile(
-                title: Text(zone.name),
-                subtitle: zone.description != null ? Text(zone.description!) : null,
-                trailing: Text('${zone.devicesCount ?? 0} устр.'),
+    return Scaffold(
+      body: RefreshIndicator(
+        onRefresh: _refresh,
+        child: FutureBuilder<List<Zone>>(
+          future: _future,
+          builder: (context, snapshot) {
+            if (snapshot.connectionState != ConnectionState.done) {
+              return const Center(child: CircularProgressIndicator());
+            }
+            if (snapshot.hasError) {
+              return ListView(
+                physics: const AlwaysScrollableScrollPhysics(),
+                children: [
+                  Padding(
+                    padding: const EdgeInsets.all(24),
+                    child: Text('${snapshot.error}', textAlign: TextAlign.center),
+                  ),
+                ],
               );
-            },
-          );
-        },
+            }
+
+            final zones = snapshot.data!;
+            return ListView.separated(
+              physics: const AlwaysScrollableScrollPhysics(),
+              itemCount: zones.length,
+              separatorBuilder: (context, index) => const Divider(height: 1),
+              itemBuilder: (context, index) {
+                final zone = zones[index];
+                final tile = ListTile(
+                  title: Text(zone.name),
+                  subtitle: zone.description != null ? Text(zone.description!) : null,
+                  trailing: Text('${zone.devicesCount ?? 0} устр.'),
+                  onTap: isOwner ? () => _openForm(zone: zone) : null,
+                );
+
+                if (!isOwner) return tile;
+
+                return Dismissible(
+                  key: ValueKey(zone.id),
+                  direction: DismissDirection.endToStart,
+                  background: Container(
+                    color: Theme.of(context).colorScheme.error,
+                    alignment: Alignment.centerRight,
+                    padding: const EdgeInsets.symmetric(horizontal: 20),
+                    child: const Icon(Icons.delete, color: Colors.white),
+                  ),
+                  confirmDismiss: (_) => _confirmDelete(zone),
+                  child: tile,
+                );
+              },
+            );
+          },
+        ),
       ),
+      floatingActionButton: isOwner
+          ? FloatingActionButton(onPressed: () => _openForm(), child: const Icon(Icons.add))
+          : null,
     );
   }
 }